Structural, Morphological and Antimicrobial Activity of pure and Aluminum doped Zinc Sulfide Nanoparticles

Undoped and Aluminum (Al) doped Zinc Sulphide (ZnS) Nanoparticles (NPs) has been prepared by chemical co- precipitation method using plant zinc sulphate, Aluminum sulphate and Thiourea . The X-Ray Powder Diffraction (XRD) studies reveals Cubic structure for undoped and Aluminum doped ZnS NPs. Scanning Electron Microscopy (SEM) images shows formation of smooth surfaced ZnS NPs and average particles size was found in the range of 17 nm from the result the Aluminum doped ZnS were influenced to increase ZnS NPs particle size. The disk diffusion method was used to screen the antimicrobial activity of Aluminum doped ZnS NPs against different gram positive, gram negative bacterial and fungus culture from this investigation Aluminum doped ZnS NPs have potential antimicrobial agent which was show excellent zone of inhibition (ZoI) at different concentration against all tested microorganisms.

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Optical Examination on Zinc Sulphide Nanoparticles for Photovoltaic Applications

International Journal of Innovative Technology and Exploring Engineering - Special Issue ◽

10.35940/ijitee.b1196.1292s219 ◽

2019 ◽

Vol 9 (2S2) ◽

pp. 260-263

Keyword(s):

Research Work ◽

Visible Spectrum ◽

Zinc Nitrate ◽

Zinc Sulphide ◽

Crystalline Size ◽

Precipitation Method ◽

Zinc Sulfide Nanoparticles ◽

Optical Examination ◽

Scherrer Formula ◽

Co Precipitation

In this research work Zinc Sulphide nanoparticles are synthesized by co–precipitation method with zinc nitrate and sodium sulfide sources. The obtained particles are characterized to know its structure, crystalline pattern, crystalline size and other morphologies. The crystalline size of the material is calculated by Debye–Scherrer Formula. X–Ray Diffraction analysis, Scanning Electron Microscopy, Fourier Transform Analysis and UV–Visible spectrum analysis is performed to study the mentioned morphology and properties of the material synthesized. The central point of this research work is to study the behavior of Zinc sulfide nanoparticles for solar cell applications. Hence, luminescence property of the material is finally analyzed

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Study of Antifungal Activities of CuO/ZnO Nanocomposites Synthesized by Co-precipitation Method

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.802.89 ◽

2013 ◽

Vol 802 ◽

pp. 89-93 ◽

Cited By ~ 2

Author(s):

Kankanit Phiwdang ◽

Mongkol Phensaijai ◽

Wisanu Pecharapa

Keyword(s):

Annealing Process ◽

Precipitation Method ◽

Molar Ratio ◽

Diffusion Method ◽

X Ray Diffraction ◽

Disk Diffusion Method ◽

X Ray ◽

Mixture Phase ◽

Diffraction Peaks ◽

Co Precipitation

In this work, series of CuO/ZnO functional nanocomposites were synthesized through co-precipitation method using CuCl2×H2O and ZnCl2as starting materials with various molar ratio of copper:zinc, followed by annealing process at 600 °C for 2 hours to obtain CuO/ZnO nanocomposites. The structures of the composites were analyzed using X-ray diffraction and field emission scanning electron microscopy. For XRD result, diffraction peaks of the composites reveal the well-crystalline characteristic indicating the mixture phase of CuO and ZnO. SEM results show different morphologies of CuO, ZnO and Cu-Zn oxide nanocomposites appearing in quasi spherical structure.The composites were used for antifungal activity via agar disk diffusion method. It is found that the composite with certain ratio of Cu:Zn exhibits superiority in partial inhibition of strainAspergillusflavusTrichodermacomparing to either pure CuO or ZnO.

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Evaluating the Antimicrobial Activity of Commercially Available Herbal Toothpastes on Microorganisms Associated with Diabetes Mellitus

The Journal of Contemporary Dental Practice ◽

10.5005/jp-journals-10024-1427 ◽

2013 ◽

Vol 14 (5) ◽

pp. 924-929 ◽

Cited By ~ 4

Author(s):

Reena Kulshrestha ◽

J Kranthi ◽

P Krishna Rao ◽

Feroz Jenner ◽

V Abdul Jaleel ◽

...

Keyword(s):

Diabetes Mellitus ◽

Antimicrobial Activity ◽

Dental Health ◽

Antibacterial Properties ◽

Antimicrobial Properties ◽

Test Organism ◽

Diffusion Method ◽

Zone Of Inhibition ◽

Disk Diffusion Method

ABSTRACT Aim The present study was conducted to evaluate the efficacy of commercially available herbal toothpastes against the different periodontopathogens. Materials and methods Six herbal toothpastes that were commonly commercially available were included in the study. Colgate herbal, Babool, Meswak, Neem active, Dabur red toothpastes were tested for the study whereas sterile normal saline was used as control. Antimicrobial efficacies of dentifrices were evaluated against Streptococcus mutans and Actinobacillus actinomycetemcomitans. The antimicrobial properties of dentifrices were tested by measuring the maximum zone of inhibition at 24 hours on the Mueller Hinton Agar media inoculated with microbial strain using disk diffusion method. Each dentifrice was tested at 100% concentration (full strength). Results The study showed that all dentifrices selected for the study were effective against the entire test organism but to varying degree. Neem active tooth paste gave a reading of 25.4 mm as the zone of inhibition which was highest amongst all of the test dentifrices. Colgate Herbal and Meswak dentifrices recorded a larger maximum zone of inhibition, measuring 23 and 22.6 mm respectively, compared to other toothpastes. All other dentifrices showed the zone of inhibition to be between 17 and 19 mm respectively. Conclusion The antibacterial properties of six dentifrices were studied in vitro and concluded that almost all of the dentifrices available commercially had antibacterial properties to some extent to benefit dental health or antiplaque action. How to cite this article Jenner F, Jaleel VA, Kulshrestha R, Maheswar G, Rao PK, Kranthi J. Evaluating the Antimicrobial Activity of Commercially Available Herbal Toothpastes on Microorganisms Associated with Diabetes Mellitus. J Contemp Dent Pract 2013;14(5):924-929.

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Nitrogen and Bromide Co-Doped Hydroxyapatite Thin Films with Antimicrobial Properties

Coatings ◽

10.3390/coatings11121505 ◽

2021 ◽

Vol 11 (12) ◽

pp. 1505

Author(s):

Simona Liliana Iconaru ◽

Carmen Steluta Ciobanu ◽

Daniela Predoi ◽

Mikael Motelica-Heino ◽

Constantin Cătălin Negrilă ◽

...

Keyword(s):

Thin Films ◽

Antimicrobial Activity ◽

Spin Coating ◽

Thin Layers ◽

Precipitation Method ◽

X Ray ◽

Co Precipitation ◽

First Time ◽

Co Doped

Hydroxyapatite (Ca10(PO4)6(OH)2, HAp), due to its high biocompatibility, is widely used as biomaterial. Doping with various ions of hydroxyapatite is performed to acquire properties as close as possible to the biological apatite present in bones and teeth. In this research the results of a study performed on thin films of hydroxyapatite co-doped with nitrogen and bromine (NBrHAp) are presented for the first time. The NBrHAp suspension was obtained by performing the adapted co-precipitation method using cetyltrimethylammonium bromide (CTAB). The thin layers of NBrHAp were obtained by spin-coating. The stability of the NBrHAp suspension was examined by ultrasound measurements. The thin layers obtained by the spin-coating method were examined by scanning electron microscopy (SEM), optical microscopy (OM), and metallographic microscopy (MM). The presence of nitrogen and bromine were highlighted by energy-dispersive X-ray spectroscopy (EDS) and X-ray photoelectron spectroscopy (XPS) studies. Fourier transform infrared spectroscopy (FTIR) was used to highlight the chemical status of nitrogen and bromine. In addition, the powder obtained from the NBrHAp suspension was analyzed by XRD. Moreover, the in vitro antimicrobial activity of the NBrHAp suspensions and coatings was investigated using the reference microbial strains Staphylococcus aureus ATCC 25923, Escherichia coli ATCC 25922, and Candida albicans ATCC 10231. The results highlighted the successful obtainment of N and Br co-doped hydroxyapatite suspension for the first time by an adapted co-precipitation method. The obtained suspension was used to produce pure NBrHAp composite thin films with superior morphological properties. The NBrHAp suspensions and coatings exhibited in vitro antimicrobial activity against bacterial and fungal strains and revealed their good antimicrobial activity.

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Synthesis and characterization of N, O-donor Schiff base capped ZnS NPs as a sensor for fluorescence selective detection of Fe 3+, Cr 2+ and Cd 2+ ions

Modern Electronic Materials ◽

10.3897/j.moem.4.4.35062 ◽

2018 ◽

Vol 4 (4) ◽

pp. 151-162

Author(s):

Dasari Ayodhya ◽

Guttena Veerabhadram

Keyword(s):

Schiff Base ◽

Quantum Confinement ◽

Metal Ion ◽

Quantum Confinement Effect ◽

Precipitation Method ◽

Donor Ligand ◽

Zinc Sulfide Nanoparticles ◽

Co Precipitation ◽

Selective Sensor

We report the simple synthesis of zinc sulfide nanoparticles (ZnSNPs) by a co-precipitation method using Schiff base, (2-[(4-methoxy-phenylimino)-methyl]-4-nitro phenol) as a capping agent. Here, Schiff base is also used as N, O-donor ligand to control the morphology of NPs and fluorescence interactions. The formation of ZnSNPs and their optical, structural, thermal properties and morphologies were studied by means of UV–vis DRS, fluorescence, FTIR, XRD, SEM, TEM, zeta potential and TGA. The optical properties and quantum confinement effect of the products were confirmed by means of spectroscopic measurements. XRD and TEM image shows that the synthesized ZnSNPs have cubic structures with a diameter of about less than 10 nm. The prepared ZnSNPs exhibited as a selective probe detection of Fe3+, Cr2+ and Cd2+ ions by fluorometrically and the emission band which disappears in the presence of increasing concentrations of Fe3+, Cr2+ and Cd2+ ions. Based on the fluorescence quenching of the NPs in the presence of metal ion of interest, the feasibility of their determinations was examined according to the Stern-Volmer equation. Our work suggested that Schiff base capped ZnSNPs could be a potential selective sensor in the detection of heavy metal ions.

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Influence of pH on Structural, Morphological, Optical, Photocatalytic, and Antibacterial Properties of Yttrium Oxide Nanoparticles via Co-Precipitation Method

10.21203/rs.3.rs-385905/v1 ◽

2021 ◽

Author(s):

Kiruthika Parangusan ◽

Venkat Subramanium ◽

Lakshmanaperumal Sundarabharathi ◽

Karthik Kannan ◽

Devi Radhika

Keyword(s):

Yttrium Oxide ◽

Antibacterial Properties ◽

Blue Emission ◽

Precipitation Method ◽

Diffusion Method ◽

Bandgap Energy ◽

Oxide Nanoparticles ◽

Ph Values ◽

Co Precipitation ◽

Yttrium Oxide Nanoparticles

Abstract Yttrium oxide nanoparticles with multiform morphologies have been synthesized by the co-precipitation method. The structure, morphology, functional groups, optical and photoluminescence properties were examined through X-ray diffraction (XRD), Scanning electron microscope (SEM), Fourier transform infrared spectrometer (FTIR), UV-Visible (UV-Vis), Photoluminescence spectra (PL). The XRD patterns obtained for the samples synthesized at various pH values confirmed the cubic structure of Y2O3. The patterns obtained on the samples at pH values of 8 and 9 appeared as have sharp peaks suggested, that the samples were well crystallized. From UV-vis spectra, it revealed that the bandgap energy exhibits a blue shift in the absorption edge for the samples with the increase of pH due to their changing morphologies and surface structures. In the PL spectra, the obtained Y2O3 samples demonstrate an intense and bright UV and blue emission under the excitation wavelength range of 250 nm. The photocatalytic degradation of the Y2O3 nanostructure was studied against the Methylene blue (MB) dye under sunlight irradiation. The results showed good recital under solar light irradiation. Further, the antimicrobial activities of Y2O3 nanostructure against foodborne pathogens (Staphylococcus aureus and Salmonella typhi) were examined by using the disc diffusion method. Moreover, the Y2O3 nanostructure was found to be biocompatible.

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Application of Optimised Nanocarbon Materials and Biofertilisers as a Potent Superfertiliser: Towards Sustainable Agriculture Production

Science of Advanced Materials ◽

10.1166/sam.2021.3948 ◽

2021 ◽

Vol 13 (5) ◽

pp. 812-819

Author(s):

Mohamed Helmi Hadj Alouane ◽

Faheem Ahmed ◽

Nermin Adel Hussein El Semary ◽

Munirah F. Aldayel ◽

Fatimah H. Alhaweti ◽

...

Keyword(s):

Environmental Sustainability ◽

Carbon Nanomaterials ◽

Growth Parameters ◽

Precipitation Method ◽

Great Promise ◽

Sem Images ◽

Nanocarbon Materials ◽

Co Precipitation ◽

Carbon Based Nanomaterials ◽

Dose Dependent

In this work, carbon-based nanomaterials including; carbon nanotubes (CNT) and graphene were combined with biofertilisers and tested their impact on germination of Hordeum vulgare. The interaction between nanomaterials and biofertilisers was analysed. Scanning electron microscopy (SEM) images revealed that the surface of algal cells was covered with carbon nanomaterials including graphene and CNTs. Raman studies showed the characteristic band of graphene, CNTs and Algal cells. The combination of carbon nanomaterials with biofertilizers resulted in significantly better growth than with nanomaterials individually. To prepare a more effective superfertiliser, zinc ferrites (ZnFe2O4) nanoparticles were added to the nanomaterials-biofertilisers combination. These zinc ferrites nanofertilisers had a size ranging from 8–12 nm and were prepared by co-precipitation method and used at two different doses. The results showed that the growth parameters were increased most significantly with addition of 0.25 ml of ZnFe2O4 nanoparticles. Increasing the dose caused a less increase in growth parameters. These results indicated that increase in growth parameters was dose-dependent. These results demonstrated a great promise for novel formulation of superfertiliser that significantly enhanced plant growth without pollution or excessive use of harmful chemicals for better food security and environmental sustainability.

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Antimicrobial Activity of two Mentha Species Essential Oil and its Dependence on Different Origin and Chemical Diversity

Natural Product Communications ◽

10.1177/1934578x1801300832 ◽

2018 ◽

Vol 13 (8) ◽

pp. 1934578X1801300 ◽

Cited By ~ 1

Author(s):

Mária Pl'uchtová ◽

Teresa Gervasi ◽

Qada Benameur ◽

Vito Pellizzeri ◽

Daniela Grul'ová ◽

...

Keyword(s):

Antimicrobial Activity ◽

Antibacterial Activity ◽

Essential Oil ◽

Inhibition Zone ◽

Chemical Diversity ◽

Diffusion Method ◽

Salmonella Spp ◽

Disk Diffusion Method ◽

Gram Positive Bacteria ◽

Growth Inhibition Zone

Genus Mentha presents group of plants which are the most studied in family Lamiaceae. Aboveground parts are used for different purposes in pharmacy, food industry or confectionery. Most important is natural product extracted from leaves - essential oil (EO). The aim of presented experiment was to demonstrate different chemotype and compare antibacterial activity of two Mentha species EO. Plant samples were obtained from various environments – from Slovakia and from Italy. Dominant compounds were determined by GC/MS. The results showed high amount of menthol and menthone in tested Slovak peppermint EO. On the other hand, carvone and 1,8-cineole were determinate as dominant compounds in Italian spearmint EO. The antimicrobial activity of the EO was investigated by disc diffusion and broth micro dilution methods. EO was evaluated for their antibacterial activity against 7 microorganisms: Enterobacter cloacae, Salmonella spp., Klebsiella pneumoniae, Escherichia coli, Staphylococcus aureus, Streptococcus pyogenes. The determination results of antibacterial activity by agar disk diffusion method ranged from 7 to 14 mm of the growth inhibition zone. MIC of tested mint EO varied from 0.625 to 2.5 μg/mL. In addition, both EO showed relatively the same antibacterial activity against the selected Gram-negative bacteria. However, there is a variation in the antibacterial activity against Gram-positive bacteria.

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Antimicrobial Activity of Cultivable Endophytic and Rhizosphere Fungi Associated with “Mile-a-Minute,” Mikania cordata (Asteraceae)

BioMed Research International ◽

10.1155/2020/5292571 ◽

2020 ◽

Vol 2020 ◽

pp. 1-7 ◽

Cited By ~ 1

Author(s):

Pavithra L. Jayatilake ◽

Helani Munasinghe

Keyword(s):

Escherichia Coli ◽

Staphylococcus Aureus ◽

Pseudomonas Aeruginosa ◽

Antimicrobial Activity ◽

Antimicrobial Properties ◽

Pharmaceutical Products ◽

Diffusion Method ◽

Molecular Characteristics ◽

Disk Diffusion Method ◽

Rhizosphere Fungi

Endophytic and rhizosphere fungi are understood to be aiding the host plant to overcome a range of biotic and abiotic stresses (nutrition depletion, droughts, etc.) hence, they remain to be reservoirs of plethora of natural products with immense use. Consequently, this investigation of endophytic and rhizosphere fungi isolated from Mikania cordata (a perennial vine that is well established in Sri Lanka) for their antimicrobial properties was performed with the aim of future derivation of potential beneficial pharmaceutical products. Leaves, twigs, and roots of M. cordata were utilized to isolate a total of 9 endophytic fungi out of which the highest amount (44%) accounted was from the twigs. A sample of the immediate layer of soil adhering to the root of M. cordata was utilized to isolate 15 rhizosphere fungi. Fusarium equiseti and Phoma medicaginis were endophytes that were identified based on colony and molecular characteristics. The broad spectrum of antimicrobial activity depicted by F. equiseti (MK517551) was found to be significantly greater (p≤0.05, inhibitory against Bacillus cereus ATCC 11778, Staphylococcus aureus ATCC 25923, Escherichia coli ATCC 25922, and Pseudomonas aeruginosa ATCC 25853) than P. medicaginis (MK517550) (inhibitory against Staphylococcus aureus ATCC 25923, Escherichia coli ATCC 25922, and Pseudomonas aeruginosa ATCC 25853) as assessed using the Kirby-Bauer disk diffusion method. Trichoderma virens and Trichoderma asperellum were rhizospere fungi that exhibited remarkable antimicrobial properties against the test pathogens chosen for the study. T. asperellum indicated significantly greater bioactivity against all four bacterial pathogens and Candida albicans ATCC 10231 under study. The ranges of minimum inhibitory concentrations (MICs) of the fungi depicting antimicrobial properties were determined. The results obtained suggest that F. equiseti, P. medicaginis, T. asperellum, and T. virens of M. cordata harness bioprospective values as natural drug candidates. This is the first report on isolation and evaluation of the antimicrobial properties of endophytic and rhizosphere fungi of Mikania cordata.

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Synthesis, Characterization and Antimicrobial Activity of d8-10 Metal Complexes of some 2-Substituted-1H-Benzimidazoles

Metal-Based Drugs ◽

10.1155/mbd.1999.163 ◽

1999 ◽

Vol 6 (3) ◽

pp. 163-167 ◽

Cited By ~ 13

Author(s):

Bahri Ülküseven ◽

Aydin Tavman ◽

Gülten Ötük

Keyword(s):

Antimicrobial Activity ◽

Metal Complexes ◽

Staphylococcus Epidermidis ◽

Shigella Flexneri ◽

Analytical Data ◽

Salmonella Typhi ◽

Diffusion Method ◽

Disk Diffusion Method ◽

Mueller Hinton ◽

Mueller Hinton Agar

The metal complexes of nine 2-substituted-1H-benzimidazoles (I-IX) with Ni(II), Pd(II), Cu(II), Ag(I), Zn(II) salts were synthesized. The compounds were characterized by melting point, analytical data, IR spectroscopy and magnetic susceptibility. The antimicrobial activity of the compounds was determined by the disk diffusion method in Mueller-Hinton Agar on Staphylococcus aureusATCC 6538, Staphylococcus epidermidis ATCC 12228, Escherichia coli ATCC 8739, Klebsiella pneumoniae ATCC 4352, Pseudomonas aeruginosa ATCC 1539, Salmonella typhi, Shigella flexneri, Proteus mirabilis, Candida albicans ATCC 10231. Cu(II)and Ag(I)complexes of II, III and IV showed considerable activity against S. aureus, S. epidermidis, Ps. aeruginosa, S. typhi, Sh. flexneri and C. albicans microorganisms, the ligands themselves having no effect.

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